8.3 Senses Flashcards
1
Q
Sensation definition
A
External stimuli trigger action potential
2
Q
Sensation vs perception
A
Sensation occurs at receptor
Perception is interpretation of stimulus by CNS
3
Q
40% of our cerebrum conscious mind associated with
A
Vision, 70% of sensory receptors in eye
4
Q
Two types of sensory receptors
A
Tonic and Phasic
5
Q
Phasic receptors
A
- quick acting, will pass, stop firing after continuous stimulation
6
Q
Tonic receptors
A
- slow acting, continue firing, no adaptation
ex. Pain
7
Q
Nociceptors are
A
Noxious/ Pain receptors
8
Q
Mechanoreceptors
A
Mechanical stresses and movement
Hairs bent
9
Q
Thermoreceptors
A
Changes in temperatures
10
Q
Photoreceptors
A
Light
11
Q
Chemoreceptors
A
Chemicals (tongue, CO2, O2)
12
Q
Baroreceptors
A
Pressure (fluid)
13
Q
Osmoreceptors
A
Osmolarity, concentration of solutes in solution
14
Q
Eye surface visible
A
Anterior one-sixth
15
Q
Eyes three tunics
A
Fibrous
Vascular
Sensory
